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It's a scorching summer day out (32.0° C) and two students are standing on a bridge that spans a distance of 200 m. The students are 110 m apart from one another and have bowling balls that they are holding over the railing. 25.0 m below the bridge is another student sitting in a stationary boat - relaxing and enjoying the day. The student in the boat is situated between the two at an unknown distance between each. One of the students drops their bowling ball from the bridge. The other student waits 2.00 seconds and then throws their ball upwards into the air at 5.00 m/s. The person in the boat hears the one ball splash 2.50 seconds after they see it being dropped (assume the light reaches them instantly). According to the student in the boat, how much time was there between splashes? Include a clearly labelled diagram. You may want to look up how to calculate the speed of sound in air given a certain temperature.
A loudspeaker of mass 18.00 {rm kg} is suspended a distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling.
A certain superconducting magnet in the form of a solenoid of length 0.40 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. The windings, made of a niobium-titanium alloy, should be cooled to 4.2 K. Discov..
Three positive charges are located in the x-y plane (see plot below), with Q1=2.10C, Q2=3.20C and Q3=4.30C. Note that the charges are located at grid intersections, and that the x and y coordinates are in cm.
An archer pulls her bowstring back 0.400 mby exerting a force that increases uniformly from zero to260 N. What is the equivalent spring constant of the bow
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
A motor has coils with a resistance of 26 Ω and operates froma voltage of 240 V. When the motor is operating at its maximumspeed, the back emf is 111V. Find the current in the coils when the motor is first turned on
Josh starts his sled at the top of a 2.3m -high hill that has a constant slope of 25 ?. How far from the hill does he end up
What conditions must be satisfied in order to have complete destructive interference of two sound waves
air at 300 k and 100 kpa flows into a hair drier having electrical work input heating coil and fan motor of 1500 w.
A magnetic field of strength 0.27 T is directed perpendicular to a plane circular loop of wire of radius25 cm. Find the magnetic flux through the area enclosed by this loop.
A 200 g ball attached to a spring by spring constant 2.70 N/m oscillates horizontally on afriction less table. Its velocity is 20.0 cm/s when x=-5.00 cm. What is the amplitude of oscillation?
a 11.5 nc charge is at x 0 cm and a -1.0 nc charge is at 6 cm. at what point or points on the x-axis is the electric
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